The Dr Marx from FL that Paul mentioned (several posts above this where he gave the link) is who is credited with creating The Marx Protocol. Thats where OC patients who have had rads do 20 HBO dives prior to and 10 more after an extraction or similar major dental procedure. Heres more info and other related things that may help ....
OCF main site ---- Osteoradionecrosis and HBO Im not sure if you have considered going to another facility for your husbands surgery. There are some airlines that fly cancer patients for free or for a minimal charge for treatments. Also many of the countries top treatment centers have housing nearby for free or substantially discounted. There are many other places that might be helpful included in the link as well.
OCF main site --- Financial Assistance Best wishes with everything!!!